erosion.hh

00001 // Copyright (C) 2001, 2002, 2003, 2004  EPITA Research and Development Laboratory
00002 //
00003 // This file is part of the Olena Library.  This library is free
00004 // software; you can redistribute it and/or modify it under the terms
00005 // of the GNU General Public License version 2 as published by the
00006 // Free Software Foundation.
00007 //
00008 // This library is distributed in the hope that it will be useful,
00009 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00010 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00011 // General Public License for more details.
00012 //
00013 // You should have received a copy of the GNU General Public License
00014 // along with this library; see the file COPYING.  If not, write to
00015 // the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00016 // Boston, MA 02110-1301, USA.
00017 //
00018 // As a special exception, you may use this file as part of a free
00019 // software library without restriction.  Specifically, if other files
00020 // instantiate templates or use macros or inline functions from this
00021 // file, or you compile this file and link it with other files to
00022 // produce an executable, this file does not by itself cause the
00023 // resulting executable to be covered by the GNU General Public
00024 // License.  This exception does not however invalidate any other
00025 // reasons why the executable file might be covered by the GNU General
00026 // Public License.
00027 
00028 #ifndef OLENA_MORPHO_EROSION_HH
00029 # define OLENA_MORPHO_EROSION_HH
00030 
00031 # include <oln/basics.hh>
00032 # include <oln/morpho/stat.hh>
00033 # include <oln/morpho/fast_morpho.hh>
00034 # include <mlc/cmp.hh>
00035 
00036 namespace oln {
00037 
00038   namespace morpho {
00084     template<class I, class E>
00085     oln_concrete_type(I)
00086       erosion(const abstract::non_vectorial_image<I>& input,
00087               const abstract::struct_elt<E>& se)
00088     {
00089       mlc::eq<I::dim, E::dim>::ensure();
00090       oln_concrete_type(I) output(input.size());
00091       input.border_adapt_copy(se.delta());
00092       oln_iter_type(I) p(input);
00093       for_all (p)
00094         output[p] = morpho::min(input, p, se);
00095       return output;
00096     }
00097 
00131     template<class I, class E>
00132     oln_concrete_type(I)
00133       n_erosion(const abstract::non_vectorial_image<I> & input,
00134                 const abstract::struct_elt<E>& se,
00135                 unsigned n)
00136     {
00137       //mlc::eq<I::dim, E::dim>::ensure();
00138       precondition(n > 0);
00139       oln_concrete_type(I) output = input.clone();
00140       for (unsigned i = 0; i < n; ++i)
00141         {
00142           oln_concrete_type(I) work = erosion(output, se);
00143           output = work;
00144         }
00145       return output;
00146     }
00147 
00148     namespace fast {
00183       template<class I, class E>
00184       oln_concrete_type(I)
00185         erosion(const abstract::non_vectorial_image<I>& input,
00186                 const abstract::struct_elt<E>& se)
00187       {
00188         return fast_morpho<I, E, utils::histogram_min<oln_value_type(I)> >
00189           (input, se);
00190       }
00191     } // end of fast
00192 
00193   } // end of morpho
00194 
00195 } // end of oln
00196 
00197 
00198 #endif // ! OLENA_MORPHO_EROSION_HH

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